Damage

2 cases · 5 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Microstructure: Secondary carbides Capture method: Kalling Etched Micrography by OM clear all

Damage — sub-branches

Aged Microstructure 2Cracks 1Multiple cracks 1Pitting 1

Results

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Cast fitting microstructure. The material presented a network of primary carbided and an austenitic matrix with coalescing secondary precipitation.
38
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched Micrography by OMDf - Aged Microstructure
Micrographic aspect of the corrosion damage in a section transverse to the pitting.
167
VIEW
ML00054 / Dec.2018
Cutlery Corrosion
M - Martensitic Stainless SteelP - Foodstuff ArticleAp - KitchenCd - Pitting Corrosion
Cm - Kalling Etched Micrography by OMDf - Pitting

More from these cases

ML00173 — Welding Cracks in an Aged HP Cast FittingM - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Micrographic detail of the network of primary carbided, white and grey, and an austenitic matrix with coalescing secondary precipitation.
30
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched Micrography by OMDf - Aged Microstructure
Micrographic detail of the cracks at the fusion line, associated to the partially melted region suggesting a liquation effect in a material that presented low ductility. After opening the cracks they propagate brittle into the base metal and created a solidification cracking in the weld metal, detailed in the next figures.
23
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched Micrography by OMDf - Multiple cracks
Micrographic detail of the cracks in the base metal created from the partially melted region suggesting that a liquation effect propagated brittle cracks into the low ductility base metal.
30
VIEW
ML00173 / May.2021
Welding Cracks in an Aged HP Cast Fitting
M - Heat Resistant SteelP - Cast FtittingAp - PetrochemicalCd - Welding
Cm - Kalling Etched Micrography by OMDf - Cracks